package leetcode;

/*
请实现一个函数，把字符串 s 中的每个空格替换成"%20"。
示例 1：
输入：s = "We are happy."
输出："We%20are%20happy."
限制：
0 <= s 的长度 <= 10000
*/

import java.util.HashSet;
import java.util.Set;

public class Offer_005 {
    public static void main(String[] args) {
        System.out.println(new Solution().replaceSpace("We are happy"));
    }
    static class Solution {
        public String replaceSpace(String s) {
            StringBuffer ret = new StringBuffer(1024);
            for (int i = 0; i < s.length(); i++) {
                char c = s.charAt(i);
                if(' ' == c){
                    ret.append("%20");
                }else {
                    ret.append(c);
                }
            }
            return ret.toString();
        }
    }
}

